/* ============================================
   CSS VARIABLES & RESET
   ============================================ */

:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #ec4899;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Neutrals */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;

    /* Layout */
    --container-max-width: 1280px;
    --header-height: 4rem;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul {
    list-style: none;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ============================================
   UTILITIES
   ============================================ */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.section {
    padding: var(--spacing-20) 0;
}

.section__title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-4);
    color: var(--color-gray-900);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    text-align: center;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-12);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.highlight {
    color: #ff69b4;
    text-shadow: 0 2px 8px rgba(255, 105, 180, 0.4);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.logo-icon {
    font-size: var(--font-size-2xl);
}

.nav__list {
    display: flex;
    gap: var(--spacing-8);
}

.nav__link {
    font-weight: 500;
    color: var(--color-gray-700);
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav__link:hover {
    color: var(--color-primary);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    width: 30px;
    height: 30px;
    position: relative;
}

.nav__toggle-icon,
.nav__toggle-icon::before,
.nav__toggle-icon::after {
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: var(--color-gray-900);
    transition: all var(--transition-base);
}

.nav__toggle-icon {
    top: 50%;
    transform: translateY(-50%);
}

.nav__toggle-icon::before,
.nav__toggle-icon::after {
    content: '';
}

.nav__toggle-icon::before {
    top: -8px;
}

.nav__toggle-icon::after {
    top: 8px;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    margin-top: var(--header-height);
    padding: var(--spacing-20) 0;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    align-items: start;
}

.hero__content {
    z-index: 2;
}

.hero__left {
    display: flex;
    flex-direction: column;
}

.hero__right {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-white);
    margin-bottom: var(--spacing-6);
}

.hero__description {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

.hero__stats {
    display: flex;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-4);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    min-width: 100px;
}

.stat__number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-white);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.stat__label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-white);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.hero__image {
    position: relative;
    height: 400px;
}

.hero__image-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
}

.floating-bubble {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    animation: float 6s ease-in-out infinite;
}

.bubble-1 {
    width: 200px;
    height: 200px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.bubble-2 {
    width: 150px;
    height: 150px;
    top: 50%;
    right: 20%;
    animation-delay: 2s;
}

.bubble-3 {
    width: 100px;
    height: 100px;
    bottom: 20%;
    left: 40%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Quick Login Form */
.quick-login {
    padding: var(--spacing-8);
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.quick-login__title {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: var(--spacing-6);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.quick-login__form {
    margin-bottom: var(--spacing-3);
}

.quick-login__input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.quick-login__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3);
}

.quick-login__row--triple {
    grid-template-columns: 1fr 1fr 1fr;
}

.quick-login__input,
.quick-login__select {
    width: 100%;
    padding: var(--spacing-4) var(--spacing-5);
    background: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 500;
    transition: all var(--transition-fast);
    color: var(--color-gray-700);
}

.quick-login__select {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.5em 1.5em;
    padding-right: var(--spacing-10);
}

.quick-login__select option {
    color: var(--color-gray-700);
    background: var(--color-white);
    font-weight: 500;
}

.quick-login__input::placeholder {
    color: var(--color-gray-400);
    font-weight: 400;
}

.quick-login__input:focus,
.quick-login__select:focus {
    outline: none;
    background: var(--color-white);
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
    transform: translateY(-1px);
}

.quick-login__btn {
    width: 100%;
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.quick-login__error {
    display: block;
    color: #fff;
    background: rgba(239, 68, 68, 0.9);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-top: var(--spacing-3);
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.quick-login__error:empty {
    display: none;
}

.quick-login__note {
    font-size: var(--font-size-base);
    color: var(--color-white);
    text-align: center;
    margin: 0;
    margin-top: var(--spacing-4);
    font-weight: 500;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.quick-login__link {
    color: var(--color-white);
    font-weight: 700;
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
    transition: all var(--transition-fast);
}

.quick-login__link:hover {
    text-decoration-color: rgba(255, 255, 255, 0.6);
    text-shadow: 0 2px 8px rgba(255, 255, 255, 0.3);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    text-align: center;
}

.btn--primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--primary:active {
    transform: translateY(0);
}

.btn--large {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

.btn--full {
    width: 100%;
}

.btn__icon {
    transition: transform var(--transition-base);
}

.btn:hover .btn__icon {
    transform: translateX(4px);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn:disabled:hover {
    transform: none;
}

.btn__loader {
    display: inline-flex;
}

.spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ============================================
   FEATURES SECTION
   ============================================ */

.features {
    background-color: var(--color-gray-50);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
}

.feature {
    background-color: var(--color-white);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.feature:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-4);
}

.feature__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-3);
}

.feature__description {
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* ============================================
   REGISTRATION SECTION
   ============================================ */

.registration {
    background-color: var(--color-white);
}

.registration__wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    align-items: start;
}

.registration__info {
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-8));
}

.info__points {
    margin-top: var(--spacing-8);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.info__point {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-lg);
    color: var(--color-gray-700);
}

.check-icon {
    flex-shrink: 0;
    color: var(--color-success);
}

.registration__form-wrapper {
    background-color: var(--color-white);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

/* ============================================
   FORMS
   ============================================ */

.form__group {
    margin-bottom: var(--spacing-6);
}

.form__label {
    display: block;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2);
}

.form__input,
.form__select,
.form__textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background-color: var(--color-white);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form__input.error,
.form__select.error,
.form__textarea.error {
    border-color: var(--color-error);
}

.form__error {
    display: block;
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4);
}

.form__checkbox {
    margin-bottom: var(--spacing-6);
}

.checkbox__label {
    display: flex;
    align-items: start;
    gap: var(--spacing-3);
    cursor: pointer;
    user-select: none;
}

.checkbox__label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    cursor: pointer;
    flex-shrink: 0;
}

.checkbox__text {
    color: var(--color-gray-700);
}

.checkbox__text a {
    color: var(--color-primary);
    text-decoration: underline;
}

.form__note {
    margin-top: var(--spacing-4);
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    text-align: center;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
    display: flex;
    align-items: start;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-6);
}

.alert--success {
    background-color: #d1fae5;
    color: #065f46;
}

.alert--error {
    background-color: #fee2e2;
    color: #991b1b;
}

.alert__icon {
    flex-shrink: 0;
}

.alert__text {
    flex: 1;
    margin: 0;
}

/* ============================================
   MEMBERS GALLERY
   ============================================ */

.members {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.members__filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-10);
    flex-wrap: wrap;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    background: var(--color-white);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-full);
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn svg {
    width: 20px;
    height: 20px;
}

.filter-btn:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
}

.members__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-6);
}

.members__loading {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-12);
    color: var(--color-primary);
}

.members__loading .spinner {
    animation: spin 1s linear infinite;
}

.member-card {
    display: flex;
    flex-direction: column;
    background: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

.member-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.member-avatar {
    position: relative;
    padding-top: 100%;
    overflow: hidden;
}

.member-avatar img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-info {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: var(--spacing-4);
}

.member-name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
}

.member-details {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-1);
}

.member-details svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.btn--view-profile {
    margin-top: auto;
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    background: linear-gradient(135deg, var(--color-primary) 0%, #764ba2 100%);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn--view-profile:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background-color: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-12);
}

.footer__title {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
}

.footer__text {
    color: var(--color-gray-400);
    line-height: 1.6;
}

.footer__subtitle {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.footer__links a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-white);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-gray-800);
    color: var(--color-gray-500);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 968px) {
    .hero__container,
    .registration__wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }

    .hero__left {
        order: 1;
    }

    .hero__right {
        order: 2;
    }

    .registration__info {
        position: static;
    }

    .nav__menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        background-color: var(--color-white);
        padding: var(--spacing-8) var(--spacing-4);
        box-shadow: var(--shadow-lg);
        transition: left var(--transition-base);
    }

    .nav__menu.active {
        left: 0;
    }

    .nav__list {
        flex-direction: column;
        gap: var(--spacing-4);
    }

    .nav__toggle {
        display: block;
    }

    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .hero__stats {
        flex-wrap: wrap;
    }

    .section__title {
        font-size: var(--font-size-3xl);
    }

    .form__row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero__title {
        font-size: var(--font-size-2xl);
    }

    .section__title {
        font-size: var(--font-size-2xl);
    }

    .features__grid {
        grid-template-columns: 1fr;
    }

    .hero__stats {
        gap: var(--spacing-4);
    }

    .stat {
        min-width: 80px;
        padding: var(--spacing-3);
    }

    .quick-login__row,
    .quick-login__row--triple {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .header,
    .nav__toggle,
    .hero__image,
    .footer {
        display: none;
    }

    body {
        color: black;
        background: white;
    }
}