/* ============================================
   VARIABLES Y RESET
   ============================================ */
:root {
    --dark-background: #2d2b29;
    --light-gray: #2C2C2C;
    --form-background: #444749;
    --text-color: #FFFFFF;
    --link-color: #FFFFFF;
    --button-active: #FFE003;
    --button-disabled: #808080;
    --spacing-top: 20px;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', Arial, sans-serif;
    background-color: var(--dark-background);
    min-height: 100vh;
    min-height: -webkit-fill-available;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    position: relative;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   CONTENEDORES PRINCIPALES
   ============================================ */
.auth-container {
    width: 100%;
    min-height: 100vh;
    background: var(--dark-background) url('img/auth-trazo.svg') no-repeat;
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: clamp(15px, 4vw, 30px);
    padding-bottom: 120px;
    position: relative;
    overflow-y: auto;
}

.auth-content {
    width: 100%;
    max-width: 480px;
    text-align: center;
    padding-top: var(--spacing-top);
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: auto 0;
}

.auth-box {
    background-color: var(--form-background);
    border-radius: 12px;
    padding: clamp(20px, 5vw, 30px);
    margin-top: clamp(10px, 2vh, 20px);
    width: 100%;
    max-width: 420px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* ============================================
   TIPOGRAFÍA
   ============================================ */
.logo {
    max-width: clamp(160px, 40vw, 200px);
    height: auto;
    margin-bottom: clamp(10px, 2vh, 20px);
}

h1 {
    font-size: clamp(20px, 5vw, 26px);
    margin-bottom: clamp(12px, 2vh, 20px);
    font-weight: normal;
    line-height: 1.3;
}

h2 {
    font-size: clamp(18px, 4.5vw, 22px);
    margin-bottom: clamp(8px, 1.5vh, 15px);
    font-weight: 500;
    line-height: 1.3;
}

.auth-box p {
    color: #FFFFFF;
    margin-bottom: clamp(20px, 3vh, 25px);
    font-size: clamp(12px, 3vw, 14px);
    line-height: 1.5;
}

/* ============================================
   FORMULARIOS
   ============================================ */
.auth-form {
    width: 100%;
}

.form-group {
    margin-bottom: clamp(18px, 3vh, 25px);
    text-align: left;
}

.form-group.half {
    flex: 1;
    min-width: 0;
}

.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: clamp(18px, 3vh, 25px);
}

.input-group {
    position: relative;
    margin-bottom: clamp(12px, 2vh, 18px);
}

.input-icon {
    position: absolute;
    width: clamp(18px, 4vw, 20px);
    height: clamp(18px, 4vw, 20px);
    stroke: var(--text-color);
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
}

.input-wrapper {
    position: relative;
    width: 100%;
    padding-left: 30px;
}

.input-wrapper::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1.5px;
    background-color: rgba(255, 255, 255, 0.8);
}

input {
    width: 100%;
    padding: clamp(10px, 2vh, 12px) 2px;
    background-color: transparent;
    border: none;
    border-bottom: 1.5px solid rgba(255, 255, 255, 0.8);
    color: var(--text-color);
    font-size: clamp(14px, 3.5vw, 16px);
    min-height: 44px;
    transition: border-color 0.3s ease;
}

input::placeholder {
    color: transparent;
}

input:focus {
    outline: none;
    border-bottom-color: var(--button-active);
}

label {
    position: absolute;
    left: 30px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-color);
    font-size: clamp(13px, 3.2vw, 15px);
    pointer-events: none;
    transition: all 0.45s ease-out;
    opacity: 0.95;
}

input:focus + label,
input:not(:placeholder-shown) + label {
    top: 2px;
    font-size: clamp(11px, 2.5vw, 12px);
    left: 0;
    color: var(--button-active);
}

.forgot-link {
    color: var(--link-color);
    text-decoration: none;
    font-size: clamp(11px, 2.8vw, 12px);
    display: inline-block;
    margin-top: 5px;
    opacity: 0.9;
}

.create-account {
    color: var(--link-color);
    text-decoration: none;
    font-size: clamp(12px, 3vw, 13px);
    display: inline-block;
    opacity: 0.9;
}

/* ============================================
   BOTONES
   ============================================ */
.btn-iniciar {
    width: 100%;
    padding: clamp(12px, 2.5vh, 15px);
    background-color: var(--button-disabled);
    color: #000000;
    border: none;
    border-radius: 25px;
    font-size: clamp(14px, 3.5vw, 16px);
    font-weight: 500;
    cursor: not-allowed;
    margin-bottom: clamp(10px, 2vh, 15px);
    transition: all 0.3s ease;
    min-height: 48px;
    opacity: 0.7;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.btn-iniciar.active,
.btn-iniciar:not([disabled]) {
    background-color: var(--button-active) !important;
    color: #000000 !important;
    cursor: pointer !important;
    opacity: 1 !important;
    box-shadow: 0 2px 8px rgba(255, 224, 3, 0.3);
}

.btn-iniciar:not([disabled]):active {
    transform: scale(0.98);
}

.btn-cancelar {
    width: 100%;
    padding: clamp(12px, 2.5vh, 15px);
    background: transparent;
    color: var(--text-color);
    border: 1.5px solid rgba(255, 255, 255, 0.4);
    border-radius: 25px;
    font-size: clamp(14px, 3.5vw, 16px);
    font-weight: 500;
    cursor: pointer;
    min-height: 48px;
    transition: all 0.3s ease;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.btn-cancelar:hover,
.btn-cancelar:active {
    border-color: rgba(255, 255, 255, 0.7);
    background: rgba(255, 255, 255, 0.05);
}

.button-container {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    margin: clamp(15px, 3vh, 25px) 0 0;
    gap: clamp(10px, 2vh, 15px);
}

/* ============================================
   CLAVE DINÁMICA
   ============================================ */
.clave-dinamica {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: clamp(6px, 1.5vw, 10px);
    margin: clamp(20px, 3vh, 30px) 0;
    padding: 0 5px;
}

.digit-input {
    width: clamp(42px, 11vw, 52px) !important;
    height: clamp(48px, 10vh, 58px) !important;
    text-align: center;
    font-size: clamp(20px, 5vw, 24px) !important;
    font-weight: 600;
    padding: 0 !important;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05) !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    transition: all 0.3s ease;
    color: var(--text-color);
}

.digit-input:focus {
    border-color: var(--button-active) !important;
    background: rgba(255, 224, 3, 0.1) !important;
    box-shadow: 0 0 0 3px rgba(255, 224, 3, 0.2);
    outline: none;
}

/* ============================================
   CÁMARA
   ============================================ */
.camera-container {
    width: 100%;
    max-width: min(340px, 90vw);
    margin: clamp(15px, 3vh, 25px) auto;
    aspect-ratio: 4/3;
    background-color: #1a1a1a;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid rgba(255, 255, 255, 0.3);
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.camera-status {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 5px 10px;
    background-color: rgba(0, 0, 0, 0.7);
    border-radius: 4px;
    color: #fff;
    font-size: clamp(10px, 2.5vw, 12px);
    z-index: 3;
    display: none;
}

.camera-status.active {
    display: block;
}

#video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    background: #1a1a1a;
}

#canvas {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
    background: #1a1a1a;
}

/* ============================================
   TÉRMINOS Y CONDICIONES
   ============================================ */
.terminos-container {
    margin-bottom: clamp(20px, 3vh, 30px);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    margin-bottom: clamp(15px, 2.5vh, 20px);
    gap: 12px;
    padding: 0 5px;
}

.termino-check {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
    appearance: none;
    -webkit-appearance: none;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
}

.termino-check:hover {
    border-color: rgba(255, 224, 3, 0.7);
}

.termino-check:checked {
    background-color: var(--button-active);
    border-color: var(--button-active);
}

.termino-check:checked::after {
    content: '✓';
    position: absolute;
    color: #000;
    font-size: 14px;
    font-weight: bold;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.checkbox-group label {
    font-size: clamp(12px, 3vw, 13px);
    line-height: 1.5;
    color: var(--text-color);
    position: static;
    transform: none;
    opacity: 0.95;
    cursor: pointer;
    flex: 1;
}

/* ============================================
   LOADING OVERLAY
   ============================================ */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    z-index: 9999;
}

.loading-overlay.active,
.loading-overlay.show {
    display: flex;
}

.loading-logo {
    width: clamp(100px, 25vw, 140px);
    height: auto;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

/* ============================================
   HELP LINKS
   ============================================ */
.help-links {
    position: fixed;
    bottom: clamp(75px, 14vh, 95px);
    left: 0;
    right: 0;
    text-align: center;
    padding: clamp(10px, 2vh, 15px) clamp(15px, 3vw, 30px);
    background: linear-gradient(to bottom, transparent, var(--dark-background) 60%);
    z-index: 10;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: clamp(8px, 2vw, 12px);
    align-items: center;
}

.help-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: clamp(10px, 2.5vw, 12px);
    opacity: 0.85;
    transition: opacity 0.3s ease;
    white-space: nowrap;
    touch-action: manipulation;
}

.help-links a:hover,
.help-links a:active {
    opacity: 1;
}

.help-links .separator {
    margin: 0 clamp(4px, 1vw, 6px);
    opacity: 0.6;
    font-size: clamp(10px, 2.5vw, 12px);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: clamp(10px, 2vh, 15px) clamp(15px, 3vw, 25px);
    background-color: var(--dark-background);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 100;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: clamp(5px, 1vh, 8px);
    align-items: flex-start;
}

.footer-logo {
    height: clamp(24px, 5vw, 32px);
    width: auto;
    object-fit: contain;
}

.sfc-logo {
    height: clamp(20px, 4vw, 26px);
    width: auto;
    object-fit: contain;
}

.footer-right {
    text-align: right;
    flex-shrink: 0;
}

.ip-address,
.datetime {
    color: var(--text-color);
    font-size: clamp(9px, 2.3vw, 11px);
    margin: 0;
    line-height: 1.5;
    opacity: 0.85;
    white-space: nowrap;
}

/* ============================================
   MEDIA QUERIES
   ============================================ */
@media (max-width: 768px) {
    :root {
        --spacing-top: 15px;
    }
    
    .auth-container {
        padding: 15px;
        padding-bottom: 140px;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .form-group.half {
        width: 100%;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-top: 10px;
    }
    
    .auth-container {
        padding: 12px;
        padding-bottom: 150px;
    }
    
    .auth-box {
        padding: 20px 18px;
    }
    
    .help-links {
        bottom: 80px;
        padding: 8px 12px;
    }
    
    .help-links a,
    .help-links .separator {
        font-size: 10px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 12px;
        align-items: center;
    }
    
    .footer-left {
        align-items: center;
    }
    
    .footer-right {
        text-align: center;
    }
    
    .clave-dinamica {
        gap: 5px;
    }
    
    .digit-input {
        width: 40px !important;
        height: 46px !important;
        font-size: 18px !important;
    }
}

@media (max-width: 375px) {
    .digit-input {
        width: 38px !important;
        height: 44px !important;
        font-size: 16px !important;
    }
    
    .auth-box {
        padding: 18px 15px;
    }
}

/* Landscape orientation */
@media (max-height: 600px) and (orientation: landscape) {
    .auth-container {
        padding: 10px;
        padding-bottom: 80px;
    }
    
    .logo {
        max-width: 140px;
        margin-bottom: 8px;
    }
    
    h1 {
        font-size: 20px;
        margin-bottom: 10px;
    }
    
    .auth-box {
        padding: 15px;
        margin-top: 10px;
    }
    
    .help-links {
        display: none;
    }
    
    .footer {
        position: relative;
        padding: 8px 15px;
    }
}

/* High DPI screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    input,
    .btn-iniciar,
    .btn-cancelar {
        -webkit-font-smoothing: antialiased;
    }
}