* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-color: #f0f2f5;
    --bg-secondary-color: #ffffff;
    --text-color: #333333;
    --text-secondary-color: #888888;
    --primary-color: #fd5068;
    --accent-color: #2de1a3;
    --border-color: #e7e7e7;
    --shadow-color: rgba(0,0,0,0.1);
    --card-gradient: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0) 100%);
}

body.theme-dark-yellow {
    --bg-color: #121212;
    --bg-secondary-color: #1e1e1e;
    --text-color: #ffffff;
    --text-secondary-color: #bbbbbb;
    --primary-color: #FFD700;
    --accent-color: #FFD700;
    --border-color: #333333;
    --shadow-color: rgba(0,0,0,0.4);
}

html, body {
    height: 100%;
    overflow: hidden;
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
}


.app {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 400px; 
    margin: 0 auto;
    background-color: var(--bg-secondary-color);
    box-shadow: 0 0 15px var(--shadow-color);
}

.main-content {
    flex-grow: 1;
    position: relative; 
    display: flex;
    flex-direction: column;
    overflow-y: auto; 
}

.app--has-bottom-menu .main-content {
    padding-bottom: 70px; 
}


.header {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    background-color: var(--bg-secondary-color);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.header__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-left: 15px;
}
.header__menu-button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}
.header__menu-button svg {
    width: 28px;
    height: 28px;
    fill: var(--text-secondary-color);
}


.card-deck {
    flex-grow: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
}
.card {
    width: 90%;
    height: 90%;
    max-height: 85vh;
    position: absolute;
    border-radius: 15px;
    box-shadow: 0 4px 12px var(--shadow-color);
    overflow: hidden;
    background-color: var(--text-secondary-color);
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
    will-change: transform, opacity;
    cursor: grab;
}
.card--panning {
    transition: none;
}
.card--dismiss-right {
    transform: translateX(150%) rotate(20deg) !important;
    opacity: 0;
}
.card--dismiss-left {
    transform: translateX(-150%) rotate(-20deg) !important;
    opacity: 0;
}
.card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.card__info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    color: #fff;
    background: var(--card-gradient);
}
.card__name-age {
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 5px;
}
.card__bio {
    font-size: 1rem;
    line-height: 1.4;
}


.actions {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    padding: 15px 0;
    flex-shrink: 0;
}
.actions__button {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background-color: var(--bg-secondary-color);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 2px 5px var(--shadow-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.actions__button:active {
    transform: scale(0.9);
    box-shadow: 0 1px 2px var(--shadow-color);
}
.actions__button svg {
    width: 30px;
    height: 30px;
}
.actions__button--dislike svg {
    fill: var(--primary-color);
}
.actions__button--like svg {
    fill: var(--accent-color);
}


.side-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100%;
    background-color: var(--bg-secondary-color);
    box-shadow: 2px 0 10px var(--shadow-color);
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
}
.side-menu--open {
    transform: translateX(0);
}
.side-menu__header {
    padding: 20px;
    font-size: 1.2rem;
    font-weight: bold;
    border-bottom: 1px solid var(--bg-color);
}
.side-menu__nav ul {
    list-style: none;
}
.side-menu__nav a {
    display: block;
    padding: 15px 20px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
    transition: background-color 0.2s ease;
}
.side-menu__nav a:hover {
    background-color: var(--bg-color);
}
.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-in-out, visibility 0s 0.3s;
}
.menu-overlay--visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease-in-out;
}


.bottom-menu {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    max-width: 400px;
    margin: 0 auto;
    height: 60px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    background-color: var(--bg-secondary-color);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -2px 5px var(--shadow-color);
    z-index: 100;
}
.bottom-menu__item {
    color: var(--text-secondary-color);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    height: 100%;
}
.bottom-menu__item svg {
    width: 28px;
    height: 28px;
    fill: var(--text-secondary-color);
    transition: fill 0.2s ease;
}
.bottom-menu__item:hover svg,
.bottom-menu__item.active svg {
    fill: var(--primary-color);
}


.settings-page {
    padding: 20px;
}
.settings-page h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.8rem;
}
.settings-group {
    margin-bottom: 30px;
}
.settings-group__title {
    font-size: 1rem;
    color: var(--text-secondary-color);
    margin-bottom: 10px;
    font-weight: 700;
}
.settings-options {
    display: flex;
    gap: 15px;
    justify-content: space-around;
}
.settings-option {
    background-color: var(--bg-color);
    border: 2px solid transparent;
    border-radius: 8px;
    padding: 15px;
    cursor: pointer;
    text-align: center;
    flex-grow: 1;
    transition: border-color 0.2s ease;
}
.settings-option.active {
    border-color: var(--primary-color);
}
.settings-option__icon {
    font-size: 1.5rem;
    margin-bottom: 5px;
}
.settings-option__label {
    font-size: 0.9rem;
}
.settings-option .color-preview {
    width: 50px;
    height: 25px;
    border-radius: 4px;
    margin: 0 auto 8px;
    border: 1px solid var(--border-color);
}
.settings-option[data-value="dark-yellow"] .color-preview {
    background: linear-gradient(45deg, #1e1e1e 50%, #FFD700 50%);
}
.settings-option[data-value="light"] .color-preview {
    background-color: #f0f2f5;
    border-color: #ddd;
}
.form-container {
    padding: 20px;
    max-width: 350px;
    margin: 40px auto;
}
.form-container h2 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 25px;
}
.form-group {
    margin-bottom: 15px;
}
.form-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary-color);
    font-size: 0.9rem;
}
.form-group input {
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}
.form-button {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 5px;
    background-color: var(--primary-color);
    color: white;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    margin-top: 10px;
}
.error-message {
    color: #ff4d4d;
    text-align: center;
    min-height: 20px;
    font-size: 0.9rem;
}
.form-switch {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
}
.form-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
}
.matches-container {
    padding: 20px;
    text-align: center;
}
.matches-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 15px;
    margin-top: 20px;
}
.match-item {
    text-decoration: none;
    color: var(--text-color);
}
.match-photo {
    width: 100%;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-color);
}
.match-name {
    margin-top: 8px;
    font-weight: bold;
    font-size: 0.9rem;
}

.chat-container { display: flex; flex-direction: column; height: 100%; }
.chat-header { display: flex; align-items: center; padding: 10px; border-bottom: 1px solid var(--border-color); flex-shrink: 0; }
.back-button { font-size: 1.5rem; text-decoration: none; color: var(--primary-color); margin-right: 15px; }
.chat-title { font-size: 1.2rem; }
.chat-messages { flex-grow: 1; padding: 10px; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; }
.message-bubble { max-width: 70%; padding: 8px 12px; border-radius: 15px; line-height: 1.4; }
.message-bubble.sent { background-color: var(--primary-color); color: white; align-self: flex-end; border-bottom-right-radius: 3px; }
.message-bubble.received { background-color: var(--bg-color); color: var(--text-color); align-self: flex-start; border-bottom-left-radius: 3px; }
.chat-form { display: flex; padding: 10px; border-top: 1px solid var(--border-color); flex-shrink: 0; }
.chat-input { flex-grow: 1; border: 1px solid var(--border-color); border-radius: 20px; padding: 10px 15px; font-size: 1rem; }
.send-button { background-color: var(--primary-color); color: white; border: none; border-radius: 50%; width: 40px; height: 40px; margin-left: 10px; cursor: pointer; font-weight: bold; }
.chat-avatar{width: 20%;}